From patchwork Mon Jul 1 05:09:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 11024827 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B08EE1580 for ; Mon, 1 Jul 2019 05:09:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A3D3A1FEBA for ; Mon, 1 Jul 2019 05:09:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 982B7284E9; Mon, 1 Jul 2019 05:09:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C458F283F9 for ; Mon, 1 Jul 2019 05:09:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727337AbfGAFJW (ORCPT ); Mon, 1 Jul 2019 01:09:22 -0400 Received: from esa3.hgst.iphmx.com ([216.71.153.141]:62457 "EHLO esa3.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726600AbfGAFJW (ORCPT ); Mon, 1 Jul 2019 01:09:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1561957762; x=1593493762; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=qEEVG/GleY2IhHFbty0HJ0pJ2y5UIrI3mATRE7IF8Kc=; b=Diqm30Kcm7OGqNleARBRbibBtLzPGtoaDRrI4n9TlPDG3I6qELRo78b4 uiy5eFw1z8mDMkMqQRwBMOJOf9XLifo98WJLC6qkMvVerhOnfwvCRl4t0 Rn6zwV8qrt/BaszfE+kLHkudulUm1LBQO72m4BrE1clq4DECqB93Nfxmp MGSraM2GPnxWmFzHeMLCZtlR2lOA3ARylmEV0vYCaigEGYUw9TIj4RFZn DrNaB5mw97u1GBlRa1umZ9KgTyAtbbYcebH+3fV1mnajaNP1AMfBnDtCQ QMkkhrkTYC+izXo+LLfEi6mdvG95ShRlHicJm+I7IGtq0XEUyznmd+mzj A==; X-IronPort-AV: E=Sophos;i="5.63,437,1557158400"; d="scan'208";a="116777198" Received: from h199-255-45-15.hgst.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 01 Jul 2019 13:09:21 +0800 IronPort-SDR: OV7gG71o6gvIvME3VhUkOaUege/B4XGH5Hw4O0rFX61N1H8JUpnN0TWM55NUuOqCd6hODn1En2 fI5rc+tTdhd04wzT4UwQftdKrD3Y1lQ/zOnH7w8Ms/UIt5P2T7ujmJDGqi+2MkiRASoCYjn+CF RYDLKKEB0JPH9RO9NSfLuSZpGvBdIEIvJsp9pxRh4a1Krt3NGNY8M6k1UzhlIMbKBxWFn2vmjB CfL2K1zKl3M87uYu7ju7A0VBxY/8TDjNKh43lj/yx0Eb/5aSvFP+BY2Mr+Lg+9/2d0jLqdpMlv Uzo1gtMd+WsozwG7zL4V+YNa Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep02.wdc.com with ESMTP; 30 Jun 2019 22:08:25 -0700 IronPort-SDR: 5Q1/wtgNC7LQxTyrkYhLPNIik4AI54eskNVOntHzv7mffxKlteo9NrYKdCUn8bKYhw4isvZJ5g SPdVCloutID4n2c79mxSiUfb8JH8Z2Rket2Ka84Uno0LYrzN3jOtW/sXX6u8cp6ZTjGVry6aiJ Gc/2K7ZuhS/EQ4B35E28wEXte+jOZls35SdbunSPMbrjyus3Emt6VMM9Dakm7MbdAcItebyKxU qCXawUZNo+M7LvMfE8Mz4LdqTlekC2voQqegup+Sjma7hhN3izjmqYYrdmvhMeP/iTKRhZj74/ KSU= Received: from washi.fujisawa.hgst.com ([10.149.53.254]) by uls-op-cesaip02.wdc.com with ESMTP; 30 Jun 2019 22:09:19 -0700 From: Damien Le Moal To: linux-scsi@vger.kernel.org, "Martin K . Petersen" , linux-block@vger.kernel.org, Jens Axboe , dm-devel@redhat.com, Mike Snitzer , linux-f2fs-devel@lists.sourceforge.net, Jaegeuk Kim Cc: Christoph Hellwig , Bart Van Assche Subject: [PATCH V6 0/4] Fix zone revalidation memory allocation failures Date: Mon, 1 Jul 2019 14:09:14 +0900 Message-Id: <20190701050918.27511-1-damien.lemoal@wdc.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This series addresses a reccuring problem with zone revalidation failures observed during extensive testing with memory constrained system and device hot-plugging. The problem source is failure to allocate large memory areas with alloc_pages() or kmalloc() in blk_revalidate_disk_zones() to store the disk array of zones (struct blk_zone) or in sd_zbc_report_zones() for the report zones command reply buffer. The solution proposed here is to: 1) limit the number of zones to be reported with a single report zones command execution, and 2) Use vmalloc to allocate large-ish arrays and buffers in place of alloc_pages() or kmalloc(). With these changes, tests do not show any zone revalidation failures while not impacting the time taken for a disk zone inspection during device scan and revalidation. Changes from v5: * Remove the gfp_t argument from blkdev_report_zones() function and device report zones method, relying instead on memalloc_noio_save/restore() where GFP_NOIO was used. Changes from v4: * bio_copy_kern does not use the vmalloc buffer for IO so does not need flush/invalidate_kernel_vmap_range() of the buffer. Changes from v3: * Reworked use of flush_kernel_vmap_range() and invalidate_kernel_vmap_range() to contain the calls within bio.c, transparently to the user of bio_map_kern(). * Add similar support to bio_copy_kern(). Changes from v2: * Move invalidate_kernel_vmap_range() of vmalloc-ed buffer to sd_zbc.c in patch 2, after completion of scsi_execute_req(). * In patch 2, add flush_kernel_vmap_range() before scsi_execute_req(). Changes from V1: * Added call to invalidate_kernel_vmap_range() for vmalloc-ed buffers in patch 1. * Fixed patch 2 compilation error with Sparc64 (kbuild robot) Damien Le Moal (4): block: Allow mapping of vmalloc-ed buffers block: Kill gfp_t argument of blkdev_report_zones() sd_zbc: Fix report zones buffer allocation block: Limit zone array allocation size block/bio.c | 28 ++++++++- block/blk-zoned.c | 67 +++++++++++--------- drivers/block/null_blk.h | 3 +- drivers/block/null_blk_zoned.c | 3 +- drivers/md/dm-flakey.c | 5 +- drivers/md/dm-linear.c | 5 +- drivers/md/dm-zoned-metadata.c | 16 +++-- drivers/md/dm.c | 6 +- drivers/scsi/sd.h | 3 +- drivers/scsi/sd_zbc.c | 108 +++++++++++++++++++++++---------- fs/f2fs/super.c | 4 +- include/linux/blkdev.h | 10 ++- include/linux/device-mapper.h | 3 +- 13 files changed, 172 insertions(+), 89 deletions(-)